monetary properties: all cryptocurrencies control the supply of the token by a schedule written in the code. this means the monetary supply of a cryptocurrency in every given moment in the future can roughly be calculated today. there is no surprise. crypto investment it‘s a system of iou. cryptocurrencies don‘t represent debts. they just represent themselves. they are money as hard as coins of gold. to understand the revolutionary impact of cryptocurrencies you need to consider both properties. bitcoin as a permissionless, irreversible and pseudonymous means of payment is an attack on the control of banks and governments over the monetary transactions of their citizens. you can‘t hinder someone to use bitcoin, you can‘t prohibit someone to accept a payment, you can‘t undo a transaction. as money with a limited, controlled supply that is not changeable by a government, a bank or any other central institution, cryptocurrencies attack the scope of the monetary policy.